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Those lists are very long and use up a significant chunk of screen real estate.
But the contents are mostly static (usually they just reflect built-in
configuration). Let's just not show them in 'status' output. They can still
be viewed with 'nta' verb.
This is a follow-up for 9f83091e3c.
Instead of reading the mtime off the configuration files after reading,
let's do so before reading, but with the fd we read the data from. This
is not only cleaner (as it allows us to save one stat()), but also has
the benefit that we'll detect changes that happen while we read the
files.
This also reworks unit file drop-ins to use the common code for
determining drop-in mtime, instead of reading system clock for that.
Currently, an empty assignment of Memory{Low,Min}= directives would be
interpretted as setting it to global default, i.e. zero. However, if we
set a runtime protection value on a unit that inherits parent's
DefaultMemory{Low,Min}=, it is not possible to revert it back to the
state where the DefaultMemory{Low,Min}= is propagated from parent
slice(s).
This patch changes the semantics of the empty assignments to explicitly
nullify any value set by the user previously. Since DBus API uses
uint64_t where 0 is a valid configuration, the patch modifies DBus API
by exploiting the variant type of property value to pass the NULL value.
When MemoryLow= or MemoryMin= is set, it is interpretted as setting the
values to infinity. This is inconsistent with the default initialization
to 0.
It'd be nice to interpret the empty assignment as fallback to
DefaultMemory* of parent slice, however, current DBus API cannot convey
such a NULL value, so stick to simply interpretting that as hard-wired
default.
Quoting https://github.com/systemd/systemd/issues/14828#issuecomment-635212615:
> [kernel uses] msleep_interruptible() and that means when the process receives
> any kind of signal masked or not this will abort with EINTR. systemd-logind
> gets signals from the TTY layer all the time though.
> Here's what might be happening: while logind reads the EFI stuff it gets a
> series of signals from the TTY layer, which causes the read() to be aborted
> with EINTR, which means logind will wait 50ms and retry. Which will be
> aborted again, and so on, until quite some time passed. If we'd not wait for
> the 50ms otoh we wouldn't wait so long, as then on each signal we'd
> immediately retry again.
Based on an internal discussion whether emergency.target should remount disks
ro, or maybe remount them rw, or do nothing. In some cases people want to boot
ro, and always remounting rw would break that. In other cases, remounting disks
ro after they have already been mounted rw is mostly pointless and might even
not be possible. So let's just document that we don't change the state.
Also: any→other, since emergency.service *is* pulled in.
Also: just advertise "emergency" as the way to boot into the target.
We are not going to remove this option, and it's way easier to type than
"systemd.unit=emergency.target".
This test runs fine locally (both on Qemu and nspawn) but sporadically fails on
autopkgtest for some reason.
Disable it while the issue is investigated to reduce noise.
Since the separate binaries contain mostly the same code,
this almost halves the size of the installation.
before:
398K /bin/udevadm
391K /lib/systemd/systemd-udevd
after:
431K /bin/udevadm
0 /lib/systemd/systemd-udevd -> ../../bin/udevadm
Fixes: #14200
We would parse numbers with base prefixes as user identifiers. For example,
"0x2b3bfa0" would be interpreted as UID==45334432 and "01750" would be
interpreted as UID==1000. This parsing was used also in cases where either a
user/group name or number may be specified. This means that names like
0x2b3bfa0 would be ambiguous: they are a valid user name according to our
documented relaxed rules, but they would also be parsed as numeric uids.
This behaviour is definitely not expected by users, since tools generally only
accept decimal numbers (e.g. id, getent passwd), while other tools only accept
user names and thus will interpret such strings as user names without even
attempting to convert them to numbers (su, ssh). So let's follow suit and only
accept numbers in decimal notation. Effectively this means that we will reject
such strings as a username/uid/groupname/gid where strict mode is used, and try
to look up a user/group with such a name in relaxed mode.
Since the function changed is fairly low-level and fairly widely used, this
affects multiple tools: loginctl show-user/enable-linger/disable-linger foo',
the third argument in sysusers.d, fourth and fifth arguments in tmpfiles.d,
etc.
Fixes#15985.
The time-based cache allows starting a new unit without an expensive
daemon-reload, unless there was already a reference to it because of
a dependency or ordering from another unit.
If the cache is out of date, check again if we can load the
fragment.
